The Havana plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
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22° on Nov. 16, 1940, the coldest reading for this week of the year since 1892. Next is 22° in 1969.
Havana’s center stands about 260 ft above sea level. Within three miles the land runs from 140 ft to 290 ft, a difference of 150 ft: gently rolling country.
Under the town center the state geologic map shows Miccosukee Formation (sand, clay, gravel), from the Late Pliocene, 2.6 to 3.6 million years old.
The section below crosses 5 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 63×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Sand, clay, gravel. Age: Late Pliocene, 2.6 to 3.6 million years old. About 8 mi of the line.
Clay, sand, gravel. Age: Tertiary Neogene, 2.6 to 23 million years old. About 7 mi of the line.
Sandstone, limestone. Age: Middle Miocene, 12 to 16 million years old. About 7 mi of the line.
Sand, clay. Age: Pleistocene to Holocene, less than 2.6 million years old. About 1 mi of the line.
Dolostone, sand, clay. Age: Miocene, 5.3 to 23 million years old. About 0.8 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Havana reaches the Gulf of America by way of Salem Branch, the Little River and the Ochlockonee: about 90 river miles.
70 miles of the trip are on the Ochlockonee.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Havana; river miles along the main stem, rounded.
Havana has a humid subtropical climate. Summer afternoons average 92° in July; winter nights fall to about 40° in January. About 59 inches of rain fall in a normal year.
On November 14 Havana normally reaches 73° and falls to 48°. The record high is 85°, in 2005; the record low 26°, in 1977. The most rain on this date, 2.99 in, fell in 2008.
Normals 1991–2020 and records since 1892 from the Tallahassee Area threaded record (Tallahassee Regional Airport, 17 miles south-southeast, 200 ft lower). NOAA, through RCC-ACIS.
